In June 2023, writer Dan Rubinstein lashed camping gear to his stand-up paddleboard and embarked on an improbable solo voyage from Ottawa to Montreal, New York City, Toronto, and back to Ottawa along the rivers, lakes, and canals of a landlocked region. Over 1,200 miles and 10 weeks, he explored the healing potential of 'blue space' - the aquatic equivalent of green space - and sought out others drawn to their local waters. But the farther Rubinstein paddled, the more he realised that being in, on, or around water does more than boost our mental and physical health and prompt stewardship toward the natural world. He discovered that blue spaces are also a way to connect with the kaleidoscopic cross-section of people he met and the diverse geographies and communities he passed through. Weaving together research, interviews, and an unmacho, malodorous, anticolonial adventure tale, Water Borne shows us that we don't need an epic journey to find solutions to so many modern challenges. Repair and renewal may be close at hand: just add water.